Pinguecula and pterygium are benign growths of the conjunctiva that can result from chronic actinic irritation. Both typically appear adjacent to the cornea at the 3-o’clock position, the 9-o’clock position, or both.

A
pinguecula is a raised yellowish white mass within the bulbar conjunctiva, adjacent to the cornea. It does not tend to grow onto the cornea. However, it may cause irritation or cosmetic blemish and, although rarely necessary, can easily be removed.

A
pterygium is a fleshy triangular growth of bulbar conjunctiva that may spread across and distort the cornea, induce astigmatism, and change the refractive power of the eye. Symptoms may include decreased vision and foreign body sensation. It is more common in hot, dry climates. To relieve symptoms caused by a pterygium, artificial tears or a short period of treatment with corticosteroid drops or ointments may be prescribed. Removal is often indicated for cosmesis, to reduce irritation, and to improve or preserve vision.

Pinguecula and Pterygium

Pinguecula and pterygium are conjunctival growths that may result from chronic actinic irritation. Pinguecula (left) is accumulation of conjunctival tissue at the nasal or temporal junction of the sclera and cornea. Pterygium (right) is conjunctival tissue that becomes vascularized, invades the cornea, and may decrease vision.

Was This Page Helpful?

Also of Interest

Test your
knowledge

Some patients age-related macular degeneration (AMD) can reduce the risk of developing advanced AMD by taking daily supplements. Which of the following supplements also increases the risk of lung cancer in current and former smokers?

MSD and the MSD Manuals

Merck & Co., Inc., Kenilworth, NJ, USA (known as MSD outside of the US and Canada) is a global healthcare leader working to help the world be well. From developing new therapies that treat and prevent disease to helping people in need, we are committed to improving health and well-being around the world. The Manual was first published in 1899 as a service to the community. The legacy of this great resource continues as the Merck Manual in the US and Canada and the MSD Manual outside of North America. Learn more about our commitment to Global Medical Knowledge.